101-00121-0 Tohatsu OIL SEAL, 20-36-7

Connecting Rod Bearings
The connecting rod bearings fit tightly in the bore in the rod. If the bearing joints or backs are fretted, check the bore size. This can be an indication of wear because of a loose fit.Connecting rod bearings are available with 0.63 mm (0.025 inch) and 1.27 mm (0.050 inch) smaller inside diameter than the original size bearing. These bearings are for crankshafts that have been ground.Main Bearings
Main bearings are available with a larger outside diameter than the original size bearings. These bearings are available for the cylinder blocks with the main bearing bore that is made larger than the bores' original size. The size that is available has a 0.63 mm (0.025 inch) outside diameter that is larger than the original size bearings.Cylinder Block
If the main bearing caps are installed without bearings, the bore in the block for the main bearings can be checked. Tighten the nuts that hold the caps to the torque that is shown in the Specifications. Alignment error in the bores must not be more than 0.08 mm (0.003 inch). Refer to the Special Instruction, SMHS7606 for the use of the 1P-4000 Line Boring Tool Group for the alignment of the main bearing bores. The 1P-3537 Dial Bore Gauge Group can be used to check the size of the bores. The Special Instruction, GMGO0981 is with the group.
Illustration 1 g00294303
1P-3537 Dial Bore Gauge Group Projection Of Cylinder Liners
Note: Measuring the cylinder liner projection does not require an "H" bar to hold the cylinder liner down. The 8T-0455 Liner Projection Tool Group can be used to check the liner projection.
Illustration 2 g00294304
Liner projection components (1) Bolt (2) Washer (3) Washer (4) Spacer plate (5) Block (6) Cylinder liner
Table 1
Required Components    
Item    Part Number    Description    Quantity For One Cylinder    Quantity For Six Cylinders    
1     7H-3598     Bolt     6     26    
2     8F-1484     Washer     6     26    
3     7K-1977     Washer     6     26    Note: A fabric material is used to make the 7K-1977 Washers . These washers are a replaceable item. You may wish to order more washers than the amount that is indicated.
Illustration 3 g00294387
Note: Refer to Reuse and Salvage Guidelines, SEBF9390, "Visual Inspection of Liner Seats for 3400, C15, C16, and C18 Series Engines" for the correct cylinder top deck and spacer plate inspection procedures prior to measuring the liner projection.
Install a new spacer plate gasket and a clean spacer plate.
Install the cylinder liners in the cylinder block without seals or bands.
Install the bolts and washers into the holes with an "X".
Install the remaining bolts around the liner.Torque for bolts ... 95 N m (70 lb ft)
Use the 8T-0455 Liner Projection Tool Group to measure the liner projection at "A", "B", "C" and "D".
Record measurements for each cylinder.
Add the four readings for each cylinder. Divide the total by four in order to find the average.
Table 2
Specifications    
Liner Projection    
0.025 to 0.152 mm (0.001 to 0.006 inch)    
Maximum Variation In Each Liner    
0.051 mm (0.0020 inch)    
Maximum Average Variation Between Adjacent Liners    
0.051 mm (0.0020 inch)    
Maximum Variation Between All Liners    
0.102 mm (0.0040 inch)    Do not exceed the maximum liner projection of 0.152 mm (0.006 inch). The excessive liner projection will contribute to cracking of the liner flange.When the liner projection is correct, put a temporary mark on the liner and the spacer plate. Set the liners aside.Note: Apply liquid soap and/or clean engine oil immediately before assembly. Avoid applying the liquid soap and/or clean engine oil to the seals too early. The seals may swell and the seals may become pinched beneath the cylinder liner during the liner installation.Final assembly of the cylinder liners into engine block require the following parts to be lubricated: O-ring seals, cylinder block and upper filler band. If the lower O-rings are black in color, apply liquid soap on the lower O-ring seals and the cylinder block. Use clean engine oil on the upper filler band. If the lower O-rings are brown in color, apply engine oil on the lower O-ring seals, the cylinder block and the upper filler band.Flywheel And Flywheel Housing
Table 3
Required Tools    Quantity